I’d estimate that I use click tracks roughly 50 percent of the time in a live scenario. Of course, it varies from artist to artist. There are many different reasons to have a click track running for a song or an entire show. Sometimes, there is a complex light show that runs off of a time code, and the only way in which to sync the music and lights together is to use a click track. Sometimes the band uses certain elements like sequenced strings, loops, arpeggiators, or background vocals. In those cases, we’d need to lock with a click track, too. Even when I play with an artist where click tracks are not necessary, I still find it helpful to use a metronome for count-off’s. It keeps the transitions between songs seamless.